package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
 /*
 * 用户下单*/

    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {


        //处理葛总业务异常（地址 为空 购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null)
        {
            //抛出异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //查询当前用户的购物车数据
        //获得当前的用户id
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if(shoppingCartList == null || shoppingCartList.size() == 0)
        {
            //抛出业务一场
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }


        //像订单表中插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();

        //向订单明细表总插入n条数据
        for(ShoppingCart cart : shoppingCartList)
        {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);

        //封装vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /*
    * 用户订单的查询*/
    @Override
    public PageResult pageQueryUser(int pageNum, int pageSize, Integer status) {
        //设置分页    设置当前显示的页面
        PageHelper.startPage(pageNum,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页查询条件
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //查询出订单明细，并封装入OrderVo进行相应
        if(page != null && page.getTotal() > 0)
        {
            for(Orders orders : page)
            {
                Long oredrId = orders.getId(); // 订单id

                //查询订单明细
                List<OrderDetail> orderDetails =orderDetailMapper.getByOrderId(oredrId);

                OrderVO orderVo = new OrderVO();
                BeanUtils.copyProperties(orders,orderVo);
                orderVo.setOrderDetailList(orderDetails);

                list.add(orderVo);

            }
        }
        return new PageResult(page.getTotal(),list);
    }

    /*
    * 查询订单详情*/
    @Override
    public OrderVO details(Long id) {
        //根据id查询id
        Orders orders = orderMapper.getById(id);

        //查询该订单对应的彩屏
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将该订单及其详情封装到orderVo并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    @Override
    public void userCancelById(Long id) throws  Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //检验订单是否存在
        if(ordersDB == null)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态
        if(ordersDB.getStatus() > 2)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //订单处于但接单状态下 取消 需要进行退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED))
        {
            //调用微信支付退款装口
        }

        //更新状态退回元婴
    }

    /*
    * 再来一单*/
    @Override
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();

            //将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车队想批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /*
    * 订单搜索*/
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
      PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

      Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

      //部分订单状态 需要额外返回订单菜品信息 将Orders转化为 Ordervo
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page)
    {
        //需要返回订单菜品信息 自定义OrderVo 响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if(!CollectionUtils.isEmpty(ordersList))
        {
            for(Orders orders : ordersList)
            {
                //将共同字段赋值到OrderVo
                OrderVO orderVO =new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);

                //将订单菜品信息封装到orerVo中 并添加到orderVolist
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    @Override
    public OrderStatisticsVO statistics() {

        //根据状态 分别查询出 待接单 带配送 配送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliverylnProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据封装到orderstatistiscsvo 中相应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliverylnProgress);
        return orderStatisticsVO;
    }

    /*
    * 接答*/
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        //订单只有参在切状态为2 才可以巨蛋
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
    * 商家取消订单*/
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO)throws Exception {
     //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if(payStatus == 1)
        {
            //用胡已支付 需要退款

        }
       // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
    * 派送订单*/
    @Override
    public void delivery(Long id) {
     //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //检验顶答案是否存在 并且状态为3
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED))
        {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //跟新订单状态将
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /*
    * 完成订单*/
    @Override
    public void complete(Long id) {
        //根据id查询
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
}
